Question: What is the name of the turbid oxide with the greatest thermal conductivity?
Paraphrase: Which turbid oxide is the most effective conductor of heat?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q50690 . ?ent wdt:P2068 ?obj . ?ent wdt:P1552 wd:Q898574 } ORDER BY DESC(?obj)LIMIT 5